Question

Madison is training for a marathon. her goal is to run 26.2 miles a day. She currently can run 18.5 miles a day. About how many more miles does she need to run in a day to meet her goal?

Answer 1

26.2 - 18.5 = 7.7. I used subtraction to figure out how many more miles she needs to run each day to reach her goal. 
She needs to run 7.7 more miles a day to reach her goal. 

I hope this helps!